Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74b1a840aae88e1…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 01:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b74c201a2a1eba7c25ec6c01ab7fb61 SHA-1: 3d988a7c45cad81bd1cd984ab94c9611de4f66cd SHA-256: e74b1a840aae88e1d4b03e4705cb2df391b2f6bb7eca61960b693ffc4bd6fe35
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the URL that the heuristic identified. This suggests the document is designed to trick users into visiting a malicious site, likely for phishing or malware distribution.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wix?keyword=nursing+care+plan+for+diabetic+ketoacidosis
    • https://static.usrfiles.com/ugd/87a178_4b72a9a2d1c746fca1877ca8a6068fcd.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed2e180409194f98bff96c534e57243b.pdf
    • https://static.usrfiles.com/ugd/b8c837_10d0b055c36f4579b1d805f4e1d35ce0.pdf
    • https://static.usrfiles.com/ugd/b8c837_41b445d729604eb491da607c374981f2.pdf
    • https://static.usrfiles.com/ugd/a1fb72_61eb7546186a46dea99617473279e063.pdf
    • https://static.usrfiles.com/ugd/26481d_e1e5a207b37d4610adc5095a1241e4d2.pdf
    • https://cdn.shopify.com/s/files/1/0438/9984/6824/files/71317486875.pdf
    • https://cdn.shopify.com/s/files/1/0433/3407/4523/files/8722320159.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/9798564711.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/sosefukixepax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4383/files/west_side_story_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0448/4605/5586/files/sokuwozanex.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/muvos.pdf
    • https://cdn.shopify.com/s/files/1/0439/8707/5230/files/how_to_use_manual_locking_hubs.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061f5.bin
135a284400f4820df4935ddaa4ca19af2025aabbf6626b6fb8aae2ab5a8917e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 5496 bytes
font_01_sfnt_off000074af.bin
bbd32404eefb0fd404263b9ae6745e682f4361f7bd2ebe039ad1629fbcdfb183		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74AF 10536 bytes

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